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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: Bone. 2007 Sep 26;42(1):193–199. doi: 10.1016/j.bone.2007.09.049

Table 1.

Mean ± standard deviation are given for selected properties of middle aged and elderly cortical bone with significance indicated at p < 0.05 (ANOVA). Otherwise, difference is not significant (NS)

Property Middle Old p-value
E (GPa) 13.7 ± 0.8 13.8 ± 1.5 NS
σb (MPa) 201 ± 8 192 ± 16 NS
Toughness (N/mm3) 25.9 ± 5.8 20.2 ± 4.7 0.0341

Po (%) 6.0 ± 1.7 6.6 ± 1.4 NS
Min/Org 2.12 ± 0.09 2.13 ± 0.09 NS
PE (mmol/mol) 0.331 ± 0.111 0.794 ± 0.283 0.0005